Add new resource roles

I want to add new roles for resources. The offered default roles are not sufficient.
How can I do this?

Project > Properties > Resource roles

Thanks, I found it, but the new roles are not updated in the resource list.
regards
Alhard

What do you mean as “not updated in the resource list”? The resource list shows the resources, not the roles. You can choose a role in the resource properties dialog. New roles do appear there:

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grafik
Here in my screenshot you can see that my new roles are not shown.

I think this is the answer:
You can choose a role in the resource properties dialog. New roles do appear there:

New roles appear in this dialog too:

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Thanks Dmitry,
I understand. I will use it this way.
Another question: where do I find a good manual or a tutorial?

There are no manuals. You can watch a video tutorial on YouTube:

Great thanks. I will learn more about your tool.